1661032163 has 16 divisors (see below), whose sum is σ = 1929937920. Its totient is φ = 1400220000.

The previous prime is 1661032127. The next prime is 1661032169. The reversal of 1661032163 is 3612301661.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1661032163 - 2⁶ = 1661032099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1661032169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98978 + ... + 114536.

It is an arithmetic number, because the mean of its divisors is an integer number (120621120).

Almost surely, 2^1661032163 is an apocalyptic number.

1661032163 is a deficient number, since it is larger than the sum of its proper divisors (268905757).

1661032163 is a wasteful number, since it uses less digits than its factorization.

1661032163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15818.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 1661032163 is about 40755.7623287800. The cubic root of 1661032163 is about 1184.2935044655.

The spelling of 1661032163 in words is "one billion, six hundred sixty-one million, thirty-two thousand, one hundred sixty-three".